Climate Control
Discussion
My 730d has automatic climate control. It works well. I leave it in auto mode on 21 degrees C most of the year. If I'm a bit warm I turn it down a few degrees or if it's a very chilly day I turn it up to maybe 22 or 23. The A/C is left on so the windows are kept clear and it ramps up slowly so I don't get blasted with icy cold air until the engine has got up to temperature.
So how come so many people I travel with faff about with the heating and cooling for the entire journey? I can't cope being a rear seat passenger in my mother in law's car as first of all you get frozen by the icy blast of the heating 'on full' while the engine warms up and then the windows steam up because the A/C is off and then you'll alternatively freeze/boil as the heating goes on and off like a switch. It's not only the temp but all the attempts to direct the flow through various vents. Sweet Jesus just put it on auto and leave it!! I can't be alone in this, Shirley?
So how come so many people I travel with faff about with the heating and cooling for the entire journey? I can't cope being a rear seat passenger in my mother in law's car as first of all you get frozen by the icy blast of the heating 'on full' while the engine warms up and then the windows steam up because the A/C is off and then you'll alternatively freeze/boil as the heating goes on and off like a switch. It's not only the temp but all the attempts to direct the flow through various vents. Sweet Jesus just put it on auto and leave it!! I can't be alone in this, Shirley?
Women see the heater control as an on and off switch, no in between.
I've spent years telling others that if they leave the blower on the lowest setting the windows will not fog up, but instead they turn it off until you can't see out of the window then they put it on the max setting.
I've spent years telling others that if they leave the blower on the lowest setting the windows will not fog up, but instead they turn it off until you can't see out of the window then they put it on the max setting.
Transiter said:
Women see the heater control as an on and off switch, no in between.
I've spent years telling others that if they leave the blower on the lowest setting the windows will not fog up, but instead they turn it off until you can't see out of the window then they put it on the max setting.
^This^I've spent years telling others that if they leave the blower on the lowest setting the windows will not fog up, but instead they turn it off until you can't see out of the window then they put it on the max setting.
My girlfriend cannot fathom that climate control will take care of everything if you just leave it alone. The aircon is perennially off unless it's roasting and the heater is either full blast or off altogether. The number of times I've set it to 21°C with aircon on auto and tried to explain that it will do everything it can to maintain that, but she still doesn't get it. Absolutely infuriating.
BrewsterBear said:
Transiter said:
Women see the heater control as an on and off switch, no in between.
I've spent years telling others that if they leave the blower on the lowest setting the windows will not fog up, but instead they turn it off until you can't see out of the window then they put it on the max setting.
^This^I've spent years telling others that if they leave the blower on the lowest setting the windows will not fog up, but instead they turn it off until you can't see out of the window then they put it on the max setting.
My girlfriend cannot fathom that climate control will take care of everything if you just leave it alone. The aircon is perennially off unless it's roasting and the heater is either full blast or off altogether. The number of times I've set it to 21°C with aircon on auto and tried to explain that it will do everything it can to maintain that, but she still doesn't get it. Absolutely infuriating.

Pretty sure there's a similar thread lately...
Anyway I always do the same too leaving the AC in AUTO mode unless I need to quickly defrost.
The only thing I control manually is the recirculation mode which I normally leave turned off unless I'm stuck in traffic behind a bus.
From recent conversations with work colleague it seems that most people believe leaving the AC on will affect the MPG or will drain the battery...
Anyway I always do the same too leaving the AC in AUTO mode unless I need to quickly defrost.
The only thing I control manually is the recirculation mode which I normally leave turned off unless I'm stuck in traffic behind a bus.
From recent conversations with work colleague it seems that most people believe leaving the AC on will affect the MPG or will drain the battery...
GT03ROB said:
BrewsterBear said:
Transiter said:
Women see the heater control as an on and off switch, no in between.
I've spent years telling others that if they leave the blower on the lowest setting the windows will not fog up, but instead they turn it off until you can't see out of the window then they put it on the max setting.
^This^I've spent years telling others that if they leave the blower on the lowest setting the windows will not fog up, but instead they turn it off until you can't see out of the window then they put it on the max setting.
My girlfriend cannot fathom that climate control will take care of everything if you just leave it alone. The aircon is perennially off unless it's roasting and the heater is either full blast or off altogether. The number of times I've set it to 21°C with aircon on auto and tried to explain that it will do everything it can to maintain that, but she still doesn't get it. Absolutely infuriating.

Long journeys visting family or whatever will ALWAYS result in an argument over the temp of the car. I like it at a cool 18 degrees where as the OH would rather it would be at 26! Also, she'll say things like "It won't warm us up because it's not blowing hot air on us, just put it on the face vent on hot for like 2 minutes and it will warm me up". She's an intelligent girl, but she just didn't understand that when I then put it back on auto at say 20 degrees it would cool it back down again! There is something about the female mind that doesn't understand thermostats!
I have an MR2 with 1987 vintage climate control (and cruise control - luxury!)
Although the aircon is good, the fastest way to cool the car after it's been parked in the sun in summer is to drop both windows until some of the heat soak has gone. Black interior & 40+ degrees is not a good combination.
I have to turn the AC off auto until the temperature has dropped, or the fan runs flat out and the noise annoys me.
Although the aircon is good, the fastest way to cool the car after it's been parked in the sun in summer is to drop both windows until some of the heat soak has gone. Black interior & 40+ degrees is not a good combination.
I have to turn the AC off auto until the temperature has dropped, or the fan runs flat out and the noise annoys me.
SteveSteveson said:
crazy about cars said:
From recent conversations with work colleague it seems that most people believe leaving the AC on will affect the MPG
And they would be right, at least at low speeds.SteveSteveson said:
crazy about cars said:
From recent conversations with work colleague it seems that most people believe leaving the AC on will affect the MPG
And they would be right, at least at low speeds.GetCarter said:
SteveSteveson said:
crazy about cars said:
From recent conversations with work colleague it seems that most people believe leaving the AC on will affect the MPG
And they would be right, at least at low speeds.TheBALDpuma said:
I've tested this over probably 100s of tanks of fuel, and there is no significant difference between A/C on and A/C off - I think the fact of the matter is that other factors contribute so much more that the A/C won't show an impact either way.
Anecdotal evidence is not evidence:www.autoexpress.co.uk/car-news/31861/mpg-mythbuste...
It can make quite a big difference, depending on how you drive and how you use AC.
SteveSteveson said:
Anecdotal evidence is not evidence:
www.autoexpress.co.uk/car-news/31861/mpg-mythbuste...
It can make quite a big difference, depending on how you drive and how you use AC.
It sounds like an older style "AC" button doesn't it, rather than automatic climate control which cuts the AC pump in and out as and when it's required. I believe the older AC or snowflake buttons just turn it on and leave it on.www.autoexpress.co.uk/car-news/31861/mpg-mythbuste...
It can make quite a big difference, depending on how you drive and how you use AC.
Article says:
"Air-conditioning
The first test simply involved pushing a button on the centre console to activate the air-con. There was a slight change in engine revs as Alan did it, then he and Anthony headed out on to the route.
Sixteen minutes later, they were back – with some dramatic results. “It’s made an eight per cent difference,”"
I've had a number of girlfriends who freely admitted (pre climate control days) that they had no idea at all what most of the heating/aircon controls did, and they just sawed away randomly at them.
Best of all was the Kiwi who religiously selected recirculation (no aircon) and then complained her windscreen was always misting up. She was an otherwise intelligent woman but for some reason had a mental block about car heating controls.
Best of all was the Kiwi who religiously selected recirculation (no aircon) and then complained her windscreen was always misting up. She was an otherwise intelligent woman but for some reason had a mental block about car heating controls.
A gripe of mine is when giving people a lift they get in the car and straight away turn the dial round to the 'hot' position.
1. It's not your car, don't touch stuff without asking.
2. It's climate control, the weather is cold so it will blow hot air, several people I know seem to struggle with the concept of climate versus a blower/air con.
3. If the engine is cold, the air will be cold, moving the dials won't change this!
The number of people who have paid for climate and have no concept of how it works must be huge!
1. It's not your car, don't touch stuff without asking.
2. It's climate control, the weather is cold so it will blow hot air, several people I know seem to struggle with the concept of climate versus a blower/air con.
3. If the engine is cold, the air will be cold, moving the dials won't change this!
The number of people who have paid for climate and have no concept of how it works must be huge!
TheBALDpuma said:
I've tested this over probably 100s of tanks of fuel, and there is no significant difference between A/C on and A/C off - I think the fact of the matter is that other factors contribute so much more that the A/C won't show an impact either way.
Read this: http://www.airconditioningforcars.co.uk/ACpage05.h...SteveSteveson said:
GetCarter said:
SteveSteveson said:
crazy about cars said:
From recent conversations with work colleague it seems that most people believe leaving the AC on will affect the MPG
And they would be right, at least at low speeds.TheBALDpuma said:
I've tested this over probably 100s of tanks of fuel, and there is no significant difference between A/C on and A/C off - I think the fact of the matter is that other factors contribute so much more that the A/C won't show an impact either way.
Anecdotal evidence is not evidence:www.autoexpress.co.uk/car-news/31861/mpg-mythbuste...
It can make quite a big difference, depending on how you drive and how you use AC.
My evdience is all my driving, but covers three cars, probably 6 years and literally 100s of fill ups. Yes I have spread sheets and some spare time!
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